Lasing efficiency in microlayers of active medium with agglomerated aluminum or silver nanoparticles

It is experimentally shown that the introduction of agglomerates of aluminum or silver nanoparticles with a concentration of the order 10
⁷
cm
⁻³
into the ethanol solution of R6G with 20 microns thickness of microlayers decreases the threshold lasing by about two orders of magnitude is compared to the threshold of stimulated emission in a microlayer of pure ethanol solution R6G.